Beat-up and weft-inserting mechanism for shuttleless looms



June 11, 1929. H. L.-BYRD 1,717,089

BEAT-UP AND WEFT INSERTING MECHANISM FOR SHUTTLELESS LOOMS Filed March 31, 1927 3 Sheets-Sheet 1 fob Inuelz'Zlo/g- BEAT-UP AND WEFT INSERTING MECHANISM FOR SHUTTLELESS LOOMS Filed March 31, 1927 3 Sheets-Sheet 2 wan 049%.!)

H. L. BYRD 1,717,089

BEAT-UP AND WEFT 'INSERTING MECHANISM FOR SHUTTLELESS LOOMS June 11, 1929.

Filed March 31, 1927 5 Sheets-Sheet n wen-ta Patented June 11, 1929.

UNITED STATES PATENT OFFICE.

HUGH LINLEY BYR-D', OF STOCKPORT, ENGLAND, ASSIGNOR TO DREY, STMPSON 8c COMPANY, LIMITED, OF SOUTH REDDISH, NEAR STOCKPORT, ENGLAND.

BEAT-UP AND WEFT-INSERTING MECHANISM FOR SHUTTLELESS LOOMS.

Application filed March 31, 1927, Serial No. 179,918, and in Great Britain April 6, 1926.

This invention has reference to shuttleless looms for weaving fabrics, and to such looms of the kind in which the. weft is inserted into the warp sheds, from one or each side of the .loom, by needle-like inserting devices, and more particularly to such looms wherein two inserting devices, one on each side of the loom, simultaneously advance into, and meet about the middle of, the warp shed and then recede, and a loop of weft carried into the shed by one of the devices, is at the point of meeting transferred to the other device which as it subsequently recedes, completes the lay ing of the weft in the shed.

The invention has for its object to provide in looms of the kind referred to, improved means of operating the weft inserting devices and the loom slay, of simple construction and arrangen'ient, ellicient in action, and capable of operating at high speeds.

According to this invention the slay, in stead of being directly connected with the crank pin by means of a connecting rod as is usual, is connected with the crank pin by linkage which through other links and levers operates the weft inserting device or devices in such manner that after the slay has moved a certain distance back from beating up and during the continued backward movement of the slay and during a pause or dwell which occurs at the end of such movement, the. inserting device or devices is or are advanced. into the shed, while during about the first half of the forward movement of the slay to beat up the inserted weft, the inserting device or devices is or are withdrawn from the shed.

One embodiment of the invention is hereinafter described with reference to the accompanying drawings in which Fig. 1 is a fragmentary diagranmiatic longitudinal section looking towards the right hand side of the loom. and Fig. 2. is a View looking on the left hand side of Fig. 1, i. e., towards the front of the loom, with the slay in its forward or heatup position, Figs. 3and 1 are like views to Figs. 1 and 2, respectively, showing the slay in the position. in which the weft inserting needles begin to advance into the warp shed, and Figs. 5 and 6 are also like views to Figs. 1 and 2, respectively, showing the rearward position of the slay when the weft inserting needles are fully advanced into the warp shed.

Referring to the drawings, at each side of the loom the front end of the connecting rod 7 pivoted to the slay 8 as usual, but: its rear end is pivoted at 9 to the front end of a short link 10 which, intermediate of its length, is pivoted on thecrank pin 11. The rear end of the link 10 is pivoted to one arm of a bellcrank lever 12 pivoted at 13 above the crank shaft 14: on the loom frame. The link 10 is pivoted to the crank pin 11 at a point approxi mately one-third of its-length from its front end, and its length is such that the distance between the pivots 9, 11 equal to the length of the crank arm 14, 11. The other arm of the bell-crank lever 12 is pivoted to the upper end of a long vertical link 15, the lower end of which is pivotally connected with an arm or crank 16 on the rear end of a shaft 17 mounted in the lower end of .the slay sword or on the pivot 18 thereof, in a plane at right angles to the plane of the slay, and adapted to oscillate with the slay. The front end of the shaft 17 has mounted on it a picking lever 19, the upper end of which is connected with, and actuates the, weft inserting needle 20.

In operation, starting from the forward or beat-up position of the slay shown in Figs. 1 and 2- when the connecting rod 7, link 10 and crank 11, 14: are on the front dead centre, during first part of the rotation of the crank. the slay moves backward until the several parts of the mechanism are in the positions shown in Figs. 3 and 4.. During this movement of the slay there is no opera tion of the picking lever 19 to advance the needle 20 into the shed. During the further rotation of the crankthe slay continues to move ljiackward until the crank pin 11 has passed some little distance beyond a point vertically below the crank shaft 11 when there is a dwell in the movement of the slay until the parts are in the position shown in Figs. 5 and h with the connection rod 7, link 10 and crank 11, 14 on the back dead centre. During the movements of the parts from the positions shown in Figs. 3 and 4 to those shown in Figs. 5 and 6, the link moves down and operates the shaft 17 to cause the picking lever 19 to rapidly advance the needle into the warpshed. As the crank pin moves from the position shown in Fig. 5 and until it reaches a position almost vertically above the crank shaft, the slay continues to move backward, when after a further dwell it moves forward with the continued movement of the crank. Simultaneously with. the movement of the crank in tram the posltmn shown in Fig. 5, the link 15 is raised and operates the shaft 17' to actuate the picking lever to withdraw the needle:

20 from the warp shed, the needle being fully retracted well beforeithe slay reaches its extreme forward or beat-up posit-ion.

By varying the points of connection of the several elements of the mechanism, the relative movements of the slay and the picking lever 19 may be varied required.

hat I claim as my invention and 'desire to secure'by Letters Patent is 1. Ina shuttleless loom, a weft inserter, a slaycooperative therewith, a drive shaft having a crank pin thereon, a connecting rod pivotally connected to said slay. a link pivoted intermediate its length to said crank pin, said rod and said link being pivotally connected together whereby rotation of said shaftwill reciprocate the slay and means including other links for operatively connecting said wett inserter to sa1d first mentioned link whercbyisaid weft inserter will be actuated slay cooperative therewith, a drive shaft having a crank pin thereon, a connecting rod pivotally connected to said slay, a link pivoted intermediate its length to said crank pin, said rod and said link being pivotally connected together, whereby rotation of said shaft will reciprocate the slay and means including a bell-crank lever having one arm pivoted to said link and the other arm pivotally connected to additional links and oppe 'atively connecting said weft inserter to cause it to be actuated from said shaft.

I11 witness whereof I hereunto set my hand.

HUGH LINLEY BYRD. 

